Air and steam heater



(No Model.)

' 1 G. NIXON,.J1.

l AIR AND STEAM HEATER.

No. 325.9624. A Patented Sept. 8, 1885. r

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` (No Model.) l 2 sheets-#sheen 2.

G. NIXONJT. AIR AND STEAM HEATER.

No. 325,962. Patented sept.. g', 1885.

UNITED: STATES PATENT OEEICE.

GEORGE NIXON, JE., OE PHILADELPHIA, PENNSYLVANIA.

AIR AND STEAM HEATER.

SPECIFICATION forming part of Letters Patent No. 325,962, dated September 8, 1885.

I Application filed November 17, 1884. (No model.)

.To all whom t may concern,.-

Be it known that I, GEORGE N IXON, J r., a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Combined Hot Air and Steam Heaters, of which the following is a specification.

The object'of my invention is to construct a combined steam and hot-air furnace which will be cheap, simple in construction, and easy of access for purposes of repair, as fully described hereinafter.

ln the accompanying drawings, Figure l is a sectional elevation of my improved furnace on the line l 2, Fig. 2; Fig. 2, a sectional plan on the line 3 4, Fig. l, and Fig. 3 a perspective View of the water-back steam generator and superheater detached from the furnace-casing.

Ais the outer brick-work of the furnace; B, the foundation on which rests the grate-frame b and fire-pot.

' Fis a casing, preferably of sheet-iron, separating the combustion-chamber from the hotair space. There are the usual fire-door, a, and the ash-pit door d.

E is a semi-circular water-back, which rests on thel grate-frame and forms one half of the fire-pot, the other half being formed by the fire-brick lining D. The construction of this water-back is more fully illustrated in Fig. 3, in which it will be seen that, while in general form it is semicircular, it has a rearward projection, E', extending into the hot-air space, to increase the heating-surface.

A steam-generator, G, of the cylindrical form shown, is arranged horizontally directly above the re-pot, and communicates with the water-back E by two legs, e e, which also support it. Above this steam-generator G is a superheating-drum, H, which is connected to the steam-generator by a pipe, t', and a pipe, f, leads fromV this superheater out through the dome of the combustion-chamber to the parts to be heated by steam.

The return and feed pipe g is connected to the water-back E.

Cold air is admitted into the heating-chamber through the -opening m in the wall of the furnace, and the heated air passes out through the pipe nat the top of the furnace to the compartment to be heated.

Water and steam gages, safety-valve, and damper-regulations may be applied the same as in other furnaces of this character.

By the construction described above the feed-water heater, boiler, and stea1n-dome can be all finished outside and readily placed in position, and can be easily taken down and repaired.

It will be noticed that the feed-pipe g communicates with the rearward projection E of the water-back, in which a large volume of Water is at all times maintained, so that the incoming stream of cold water cannot strike directly upon the casing of the water-back, thereby obviating the evil results due tothe contact of a Stream of cold water with a highly-heated metal plate.

I claim as my invention- The combination of the re-pot and combustion-chamber of the furnace with the water-heater E, forming part of the casing of the fire-pot, the steam-generator G, located directly above the fire-potV and communicating with said water-heater, and the superheater H, above the generator and within the combustion-chamber, all substantially as set forth.

In witness whereof I have signed my name to this specification in the presence of two subscribing witnesses.

4GEORGE NIXON, JR.

Witnesses:

HARRY SMITH, HENRY HowsoN, J r. 

